Chamfering apparatus for slab doors



July 3, 1962 J. cARLow 3,041,788

CHAMFERING APPARATUS FOR SLAB DooRs Filed May 23, 1960 2 sheets-sheet `1n ,v Jack CAA-"1.0Mv "Y" Eg' Y INVENTOR.

AT1-annex July 3, 1962 J. CARLOW 3,041,788

' CHAMFERING APPARATUS FOR SLAB DOORS Filed May 23, 1960 2 Sheets-Sheet2 Fig-4.

i1 Jaen' CARLO@ NVENTOR United States Patent O 3,041,788 CHAMFERINGAPPARATUS FOR SLAB DOORS Jack Carlow, 4309 Don Carlos Drive, LosAngeles, Calif. Filed May 23, 1960, Ser. No. 30,931 Claims. (Cl. 51 87)This invention relates generally to an apparatus and device for bevelingor chamfering the longitudinal, coextensive edges of a slab door andmore particularly it relates to a sanding attachment which engages saidedges as the door passes between several sets of pressure bondingrollers.

It is a primary object of this invention to remove the four sharp,longitudinal edges of the veneer of a conventional slab door or similararticle as these sharp edges tend to damage clothing and bruise and cutthe hands of the men who handle these doors while they are beingmanufactured, shipped, stored and assembled. This device could also beused in any situation where veneer with sharp edges tends to damage theperson or clothing of the handler, such as, furniture, toys, storefixtures, ready-cut houses, etc.

Another object of this invention is to provide a sanding device which isof a flexible, self-adjusting and interchangeable nature, thuseliminating the need of spare parts and special tools and jigs. Sincethe door widths vary in size and material this is a definite advantage.

A further object of this invention is to provide means for varying andadjusting the angle of the chamfer and its width.

An important object of this invention is to provide a device of simple,compact and rugged construction, which can be assembled and disassembledquickly and easily. With these and other objects in view, this inventionresides in the combinations, arrangements and functional relationshipsof elements as set forth in the following specication and particularlypointed out in the appended claims.

In the drawings:

FIG. 1 is a vertical section, partly in elevation, taken on the line 1 1of FIG. 2.

FIG. 2 is a horizontal section taken on the line 2 2 of FIG. 1.

FIG. 3 is a perspective, showing the door core and bevelled veneers;FIGS. 3a, 3b and 3c are enlarged detail views.

FIG. 4 is an enlarged detail section taken on the line 4-4 of FIG. 2.

FIG. 5 is a section taken on the line 5 5 of FIG. 6.

FIG. 6 is a section taken on the line 6 6 of FIG. 5.

FIG. 7 is vertical section taken on the line 7 7 of FIG. 5.

FIG. 8 is a section taken on the line 8 8 of FIG. 9.

FIG. 9 is a view taken on the line 9 9 of FIG. l.

FIG. 10 is a view looking in the direction of the arrow 10 of FIG. 9 andFIG. l1 is a section taken on the line 11 11 of FIG. l0.

Referring to the drawings in detail, the numeral 10 refers to a basemember from which upstands bearings 12, 13, 14 and 15 which carryrevolvable spaced, pairs of pressure rollers 16 and 18 mounted on shafts20 and 22. Positioned about midway between said pairs of rollers are apair of upstanding bearing plates 24 and 26 having apertures 28 and 30,see F-IG. 5, which serve as bearings for my novel sanding attachments32. A headed pivot pin 34, see FIGS. 5 and 6, forms a pivot for slottedarm 36 which is swingably mounted and slidably keyed at 37 thereon. Pins34 are secured to plates 24 and 26 by jam nuts 38.

The motor 40 is provided with a partial shell 42, havp lCC ing a cutout44 for the insertion of a sanding wheel 46 having mounted thereon asanding sheet or band 48.

The motors 40 have spacing lugs 47 and a drilled and tapped mounting lug49.

The shell is cut-out at 50 for the insertion of a preferably weldedplate 52 which fastens as at 53, to lug 49 of motor 40. Plate 52 carriesa drilled and tapped slidable mounting plate 54. Arm 36 is bifurcatedand also grooved at 37 to slide on key 57 of plate 54 and bolt 41secures arm 36 and plate 54 together in slidable relation.

The shell 42, see FIGS. 9 and 10, carries angular housings 56, see FIGS.10 and ll, which are welded at a suitable angle to shell 42. Gauge armsor limiting fences 57, provided with rounded contact portions 60, havexed thereto, by means of fasteners 62, dove-tail bars 66.

Housings 56 have internal mating dove-tail grooves 66a, said groovesbeing provided with gib keys 68 which are xed to said housings byfasteners 70.

The housings 56 have upstanding lugs 72 which are drilled and tapped at74 for the reception of screws 76. Fences 57 have upstanding ears 78which are drilled and aligned for the reception of the enlarged portions74a of screws 76, said screws being provided wtih washers 75 abuttingshoulders 77 on the enlarged threaded portions 74b of screws 76 toprevent axial movement. Knobs are also provided on the free ends ofscrews 76 for turning the same.

When the apparatus is in operation, the core of the slab door D with thefront and back veneer V assembled, is fed through rollers 18 in thedirection of the arrows. The sanding attachments are positioned at theangle desired for the bevel by (see FIG. 6) adjusting the screw 82 whichthreadedly engages a drilled and tapped hole in arm 84. Arm 84 isintegral with and extends at right angles from arm 36, the free end ofscrew 82 engaging stop lug 86 which is fixed to plates 24 and 26.

The weight of the light motor 40 and greatly increased weight of some ofthe associated parts causes. the upper apparatus to swivel about pin 34and force the wheels 46, see FIG. 4, against the veneer V. However thelower apparatus" must be flexibly pulled up against the veneer and tothis end arm 84 is provided with a fitting 88 to which is fastened along coiled spring 90. The free end of spring 90 is connected to pin 92which is ixed to plate 24. As shown in FIG. l, the lower apparatus isyieldedly forced upward, into contact with veneer V.

As shown in FIG. l0, the sanding wheel is limited by fences 57 whichrest upon the veneer V and may be adjusted for deeper or shallowersanding by turning knobs 80 which advance and retract said fences.

It is understood that the right is reserved to make numerous changes inthe size, shape, materials and arrangement of parts without departingfrom the spirit of the invention or the scope of the appended claims.

I claim:

1. A sanding device having a pair of rollers mounted for guiding a slabdoor, comprising the combination of bearing plates having apertures,pivoted sanding units including motors, shells fixed to said motors,mounting arms projecting from said shells, slotted arms pivoted in theapertures of said plates and fastened in sliding relation to saidmounting arms, revolving sanding Wheels carried by said motors andlimiting fences carried by said shells, whereby said sanding wheels maybe pivotally moved about the apertures in said bearing plates andradially adjusted with respect to said apertures, so that said sandingwheels of said units may yieldably move into contact with opposingsurfaces of a slab door for chamfering the longitudinal edges thereof.

2. The device of claim l in which the pivoted sanding units are arrangedas upper` and lower units, the lower units being weighted so as togravitate into operating contact with the door and spring means toyieldedly urge saidl lower units into operating Contact with said door.

3'. The device of claim 2, and adjustable stop means on said plateadapted to co-act with said upper units to prevent the same frompivoting beyond a predetermined point.

4. An apparatus of the kind described for use with a plurality ofpressure rollers through which is fed a slab door having a core and backand front veneers, comprising a motor, a revolving shaft on said motor,a sanding Wheel on said shaft, limiting fence means carried by saidmotor to engage said veneer, means for pivotally mounting said motor tocontrol the angular position of said motor whereby` the sandingwheel maygravitate into contact With one of said veneers, said limiting fencemeans including fences having rounded contact surfaces, dove-tail stripsxed to said fences, a shell fixed to said motor, housings fixed to saidshell, said housings having internal mating dove-tail grooves forsliding reception of said dove-tail strips, and adjusting means for saidfences.

5. An apparatus of the kind described for use with a plurality ofpressure rollers through which is fed a slab door having a core and backand front veneers, comprising a motor, a revolving shaft on said motor,a sanding wheel on said shaft, limiting fence means carried by saidmotor to engage said veneer, means for pivotally mounting said motor tocontrol the angular position of said motor `whereby the sanding wheelmay gravitate into contact with one of said veneers, said limiting fencemeans including fences having rounded Contact surfaces, dove-tail stripsfixed tosaid fences, a shell fixed to said motor, housings fixed to saidshell, said housings having internal mating dove-tail grooves forsliding reception of said dove-tail strips, adjusting means for saidfences, said adjusting means including drilled and tappedlugs on saidhousings, apertured ears on said fences, and headed screws turnable insaid apertures but held against axial movement and threadably engaged insaid lugs to advance and retract said fences.

References Cited in the file ofthis patent UNITED STATES PATENTS KingAug. 15, 1939

